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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/java/awt/event/ComponentEvent.java | |
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Diffstat (limited to 'libjava/classpath/java/awt/event/ComponentEvent.java')
-rw-r--r-- | libjava/classpath/java/awt/event/ComponentEvent.java | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/libjava/classpath/java/awt/event/ComponentEvent.java b/libjava/classpath/java/awt/event/ComponentEvent.java new file mode 100644 index 000000000..3fd86853b --- /dev/null +++ b/libjava/classpath/java/awt/event/ComponentEvent.java @@ -0,0 +1,142 @@ +/* ComponentEvent.java -- notification of events for components + Copyright (C) 1999, 2002, 2005, 2006 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.awt.event; + +import gnu.java.lang.CPStringBuilder; + +import java.awt.AWTEvent; +import java.awt.Component; + +/** + * This class is for events generated when a component is moved, resized, + * hidden, or shown. These events normally do not need to be handled by the + * application, since the AWT system automatically takes care of them. This + * is also the superclass for other events on components, but + * ComponentListeners ignore such subclasses. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @see ComponentAdapter + * @see ComponentListener + * @since 1.1 + * @status updated to 1.4 + */ +public class ComponentEvent extends AWTEvent +{ + /** + * Compatible with JDK 1.1+. + */ + private static final long serialVersionUID = 8101406823902992965L; + + /** This is the first id in the range of ids used by this class. */ + public static final int COMPONENT_FIRST = 100; + + /** This is the last id in the range of ids used by this class. */ + public static final int COMPONENT_LAST = 103; + + /** This id indicates that a component was moved. */ + public static final int COMPONENT_MOVED = 100; + + /** This id indicates that a component was resized. */ + public static final int COMPONENT_RESIZED = 101; + + /** This id indicates that a component was shown. */ + public static final int COMPONENT_SHOWN = 102; + + /** This id indicates that a component was hidden. */ + public static final int COMPONENT_HIDDEN = 103; + + /** + * Initializes a new instance of <code>ComponentEvent</code> with the + * specified source and id. Note that an invalid id leads to unspecified + * results. + * + * @param source the source of the event + * @param id the event id + * @throws IllegalArgumentException if source is null + */ + public ComponentEvent(Component source, int id) + { + super(source, id); + } + + /** + * This method returns the event source as a <code>Component</code>. If the + * source has subsequently been modified to a non-Component, this returns + * null. + * + * @return the event source as a <code>Component</code>, or null + */ + public Component getComponent() + { + return source instanceof Component ? (Component) source : null; + } + + /** + * This method returns a string identifying this event. This is the field + * name of the id type, and for COMPONENT_MOVED or COMPONENT_RESIZED, the + * new bounding box of the component. + * + * @return a string identifying this event + */ + public String paramString() + { + CPStringBuilder s = new CPStringBuilder(); + + // Unlike Sun, we don't throw NullPointerException or ClassCastException + // when source was illegally changed. + if (id == COMPONENT_MOVED) + s.append("COMPONENT_MOVED "); + else if (id == COMPONENT_RESIZED) + s.append("COMPONENT_RESIZED "); + else if (id == COMPONENT_SHOWN) + s.append("COMPONENT_SHOWN "); + else if (id == COMPONENT_HIDDEN) + s.append("COMPONENT_HIDDEN "); + else + return "unknown type"; + + s.append("(").append(getComponent().getX()).append(",") + .append(getComponent().getY()).append(" ") + .append(getComponent().getWidth()).append("x") + .append(getComponent().getHeight()).append(")"); + + return s.toString(); + } + +} // class ComponentEvent |